feat(@schematics/angular): update to latest versions of TypeScript and Angular

Author: alan-agius4

packages/schematics/angular/utility/latest-versions.ts

@@ -8,10 +8,10 @@
 
 export const latestVersions = {
   // These versions should be kept up to date with latest Angular peer dependencies.
-  Angular: '~7.0.0-beta.5',
+  Angular: '~7.0.0-rc.0',
   RxJs: '~6.3.3',
   ZoneJs: '~0.8.26',
-  TypeScript: '~3.0.1',
+  TypeScript: '~3.1.1',
   // The versions below must be manually updated when making a new devkit release.
   DevkitBuildAngular: '~0.9.0-beta.1',
   DevkitBuildNgPackagr: '~0.9.0-beta.1',